Pump-rod coupling.



C. P. THOMPSON.

PUMP ROD COUPLING.

APPLICATION FILED AU.G.17, 1914,

1,133,518. I Patented Mar.30,1915.

I) Z0 a I Inventor Witnesses Attorneys CASSIUS P. THOMPSON, 0F LAWRENCEVILLE, ILLINOIS,

PUMP-ROD COUPLING.

Specification of Letters Patent.

Patented Mar. so, 191 5.

Application filed August 17, 1914. Serial No. 857,222.

To all whom it may concern:

Be it known that I, CAssIUs P. THOMP- SON, a citizen of the United States, residing at Lawrenceville, in the county of Lawrence and State of Illinois, have invented a new and useful Pump-Rod Coupling, of which the following is a specification.

The present invention appertains to pump or sucker rods foF Artesian or deep wells, and aims to provide a novel and improved coupling for the sections of the rod, whereby the sectlons may be'readily assembled and separated, and whereby they will be efi'e'ctively held in assembled relation while they arein the well.

The present invention contemplates the provision of a pump rod coupling embodying heads provided upon the adjacent ends of the rod sections, and formed with unique interengageable means whereby the rod sections may be readily assembled and separated, and whereby when the parts are assembled they will effectively resist the strains to which they are sub ected in use.

With the foregoing and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed, can be made within the scope of what is claimed, without departing from the spirit of the invention.

The invention has been illustrated in its preferred embodiment in the accompanying drawing, wherein Figure 1 is a side elevation of the coupling. Fig. 2 is a sectional 'view thereof, taken on the line' 22 of Fig. 1. Fig. 3 is an elevation of one of the coupling members or heads. Fig. 4 is a fragmental elevation of the other coupling member or head. Fig. 5 is a plan view of the last mentioned coupling member or head.

In the drawing, the numerals 1 and 2 designate two sections of a pump or sucker rod, it being understood that the rod is constructed of a plurality of the sections, but for the purposes of the resent invention, only the adjacent ends 0 two rod sections need be shown to illustrate the coupling for connectin them.

11 carrying out the present invention, the adjacent ends of the rod sections 1 and 2 are provided with the respective heads or enlarged coupling members 3 and 4:, which are of circular cross section, and of like diameter whereby they will be flush when assembled. The adjacent ends or faces of the heads 3 and 4 are oblique or inclined, as at 5 and 6, respectively. Projecting from the oblique or inclined face 6 of the head 4:, is a transverse or diametrical rib 7 which is arranged in an oblique or inclined manner similar to the face or ends 6 of the head 4:. One end of the rib 7, which will be termed the outer end, is flush with the corresponding side of the head 4, at the upper portion of the oblique or inclined face or end 6, while the other or inner end of the rib 7 terminates short of the opposite side of the head. The rib 7 is also tapered from its outer end to its inner end, that is, the sides of the rib 7 converge from the outer to the inner end thereof. The rib 7 is provided with a T-head 8, which is tapered from its outer to its inner end similar to the rib or web 7. Thus, the sides of the head 8 converge from the outer to the inner endof the head, while the top and bottom faces of the head 8 converge in the same direction. The head 8 is coextensive with the rib or web 7, and the upper face of the head 8 is approximately parallel with the face or e nd 6 of the head 4, while the shoulders 9 provided by the inner side of the head 8 or the projecting side portions thereof, are arranged at a slight angle to the face or end 6 of the head 4, as will be apparent by reference to Fig. 3. The shoulders 9 are provided with undercut bevels, as seen in the drawing.

The head or coupling member 3 is provided with a lateral or diametrical slot 10 along the face or end 5 thereof, and extending from one side of the head 3, to a point slightly short of the diametrically opposite side of the said head. Thus the other end of the slot 10 is open, while the inner end is closed and the slot 10 is tapered from its outer to its inner end similar to the rib or web 7 The slot 10 is provided with a T- head 11 into which the T-head 8 is adapted to fit snugly, the same being of similar form. The T-head 11 of the slot 10 is tapered from its open end at one side of the head 3, to its other or inner end. The sides of the T head 11 converge from the outer to the inner end of the said head, while the top and bottom of the T-head 11 converge similarly. The shoulders provided by the '1'- head 11 are provided with undercut bevels 12, matching and complementing the undercut bevels 9 of the T-head 8, it being noted that the undercut bevels 9 and 12 are tapered similar to the taper of the corresponding parts of the respective heads or coupling members l and 3. The inner ends of the slot 10 and its T-head 11 are closed by the wall 13, since the said slot and its head terminate short of the corresponding side of the head 3. The top of the T-head 11 of the slot 10 is approximately parallel with the face or end 5 of the head or coupling member 8, while the beveled shoulders 12 are at a slight angle relative to the face or end 50f the head 3, similar to the corresponding parts of the T-head 8. As will be observed, the T-heads 8 and 11 of the rib and slot 10, respectively, are disposed diagonally or obliquely relative to the axes of the rod sections.

The rod sections 1 and 2 may be readily assembled, by starting the inner ends of the rib or Web 7 and its head 8 into the outer or open ends of the slot 10 and its T- head 11', respectively, this being facilitated due to the fact that the inner ends ofthe rib 7 and its head 8 are of smaller dimensions than the outer or open ends of the slot 10 and its head 11. Then, by shifting the rod sections '1 and 2 obliquely relative to their axes, the heads or coupling members 3 and. 4 maybe assembled snugly, the faces or ends 5 and 6 of the heads or coupling members 3 and 4 abutting and fitting snugly together with the sides of the heads or coupling members flush. Due to the fact that the rib 7 and its head 8, and the slot 10 and its head 11, are tapered as specified, the said parts may be slipped into inter engagement in a ready manner and without binding the heads or coupling members 3 and 4 until they are completely assembled. Since the undercut bevels 9 and 11 are arranged at angles relative to the ends or faces 5 and 6 of the respective heads or coupling members, the said ends or faces 5 and 6 of the heads or coupling members will not abut until the same are completely assembled, and which will eliminate the liability of the parts binding prematurely. The bevels 9 and 12 in interengaging one another, will cause the coupling to successfully resist the tensile strains to which the pump rod is subjected, and due to the oblique, or inclined rod is subject to a tensile strain or draft.

The present coupling therefore enables the rod sections to be readily assembled as they are inserted into the Artesian or deep well,

andalso enables the rod sections to be readily separated when they are removed from the well, to thereby reduce the time and labor necessary. The coupling merely embodies the heads or coupling members 3 and 4 formed upon the adjacent ends of the rod sections, and no movable or encumbering parts are carried by the coupling members.

Having thus described the invention,wliat is claimed as new is In a device of the character described, a pair of rods having coupling heads at their adjacent ends, the coupling heads having oblique faces adapted to abut snugly, one coupling head having a rib projecting from its oblique face and extending from one side of the said head to a point short of the opposite side, the said rib having a T-head and theshoulders formed by the T-head having undercut bevels, the said rib and T-head being tapered from their outer to their inner ends, the top of the T-head being appr'oxi mately parallel with the oblique face of the said coupling head and the said undercut bevels being arranged at an angle relative to the said oblique face, the other coupling head having a slot at its oblique face and extending from one side of the second mentioned coupling head to a point short of the opposite side thereof, the said slot having a -T-head and the shoulders provided by the said T-head having undercu bevels, the said slot and its T-head being'tanered from their outer to their inner ends, the second men tioned coupling head havirg a wall closing the inner ends of the-said :--l0|3 and its T- head, the top of the T-herd of the said slot being approximately parallel with the oblique face of the second mentioned coupling head and the undercut bevels of the said coupling head being arranged at an angle to the oblique face thereof, as and for the purposes set forth.

'In testimony that I claim the foregoing as my own, I have hereto afiixed my signature in the presence of two witnesses.

CASSIUS P. THOMR N. Witnesses:

IVAN VVRIGHT, WADE H. NUTTALL. 

